From patchwork Thu Sep 30 14:04:19 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Xin, Xiaohui" X-Patchwork-Id: 220092 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id o8UDpwuP024517 for ; Thu, 30 Sep 2010 13:51:59 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756176Ab0I3Nqy (ORCPT ); Thu, 30 Sep 2010 09:46:54 -0400 Received: from mga03.intel.com ([143.182.124.21]:30013 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756130Ab0I3Nqx (ORCPT ); Thu, 30 Sep 2010 09:46:53 -0400 Received: from azsmga001.ch.intel.com ([10.2.17.19]) by azsmga101.ch.intel.com with ESMTP; 30 Sep 2010 06:46:52 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.57,259,1283756400"; d="scan'208";a="330506165" Received: from unknown (HELO localhost.localdomain.sh.intel.com) ([10.239.36.37]) by azsmga001.ch.intel.com with ESMTP; 30 Sep 2010 06:46:50 -0700 From: xiaohui.xin@intel.com To: netdev@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mst@redhat.com, mingo@elte.hu, davem@davemloft.net, herbert@gondor.hengli.com.au, jdike@linux.intel.com Cc: Xin Xiaohui Subject: [PATCH v12 02/17] Add a new struct for device to manipulate external buffer. Date: Thu, 30 Sep 2010 22:04:19 +0800 Message-Id: X-Mailer: git-send-email 1.7.3 In-Reply-To: <1285855474-12110-1-git-send-email-xiaohui.xin@intel.com> References: <1285855474-12110-1-git-send-email-xiaohui.xin@intel.com> In-Reply-To: <59d8a50047ee01e26658fd676d26c0162b79e5fd.1285853725.git.xiaohui.xin@intel.com> References: <59d8a50047ee01e26658fd676d26c0162b79e5fd.1285853725.git.xiaohui.xin@intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Thu, 30 Sep 2010 13:51:59 +0000 (UTC) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index fa8b476..9ef9bf1 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -530,6 +530,28 @@ struct netdev_queue { unsigned long tx_dropped; } ____cacheline_aligned_in_smp; +/*The structure for mediate passthru(zero-copy). */ +struct mp_port { + /* the header len */ + int hdr_len; + /* the max payload len for one descriptor */ + int data_len; + /* the pages for DMA in one time */ + int npages; + /* the socket bind to */ + struct socket *sock; + /* the header len for virtio-net */ + int vnet_hlen; + /* the external buffer page creator */ + struct skb_ext_page *(*ctor)(struct mp_port *, + struct sk_buff *, int); + /* the hash function attached to find according + * backend ring descriptor info for one external + * buffer page. + */ + struct skb_ext_page *(*hash)(struct net_device *, + struct page *); +}; /* * This structure defines the management hooks for network devices. @@ -952,7 +974,8 @@ struct net_device { struct macvlan_port *macvlan_port; /* GARP */ struct garp_port *garp_port; - + /* mpassthru */ + struct mp_port *mp_port; /* class/net/name entry */ struct device dev; /* space for optional device, statistics, and wireless sysfs groups */